As you begin to read the positive benefits of the Rossignol X1 Ultra Cross Country Ski Boots, it becomes quite clear that it’s hard to beat them if you’re in the market for a quality ski boot. One of the features most are raving about with the Rossignol X1 Ultra boots is the Thermo adjustable fit lining and the nylon reinforced midsoles. This means a custom, comfortable fit that also gives you ample support for all-day use and comfort. They’re also very easy to put on, so you won’t be struggling with your boots while everyone else is hitting the skids.